Power-transmission device.



A. F. STURM.

POWER TRANSMISSON DEVICE.

APPLICATION FILED MAY a, 1910.

ANDREW F. STURM, 0F NEHAWKA, NEBRASKA.

POWER-TRANSMISSION DEVICE.

Specification of Letters Patent.

Patented June 6, 1911.

Application filed May 3, 1910. Serial No. 559,198.

To all whom it may concern:

Be it known that I, ANDREW F. STURM, a citizen of the United States, anda resident of Nehawka, in the county of Cass and State of Nebraska, haveinvented certain new and useful Improvements in Pow-erflransmissionDevices, of which the following is a specification.

My invention relates to improvements in power transmission devices, andit consists, in the constructions, combinations and arrangements hereindescribed and claimed.

An object of my invention is to provide a device in which a directforward or a reverse movement may be attained by the use of a clutchmember carried by the main shaft.

A further object of my invention is to provide a device in which theforward and reverse movement may be attained by simple mechanism,thereby eliminatingthe annoyances occasioned by a multiplicity of partsand reducing the cost of manufacture to a minimum. f

A further object of my invention is to provide a device which may beused on automobiles, or on other devices in which forward and reversemovements are used.-

A further object of my invention is to provide a device by means ofwhich variable speed movements may be attained.

Other objects and advantages will appear in the following speciiicationand the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompanying drawings forming part ofthis application, in which- Figure 1 is a vertical longitudinal sectionthrough the device, Fig. 2 is a section along the line 2 2 looking inthe direction of the arrows, and Fig. 3 is a section along the line 3 3looking in the direction of the arrows.

In carrying out my invention I provide a shaft 1 which is carried insuitable bearings (not shown). It will be understood that any form ofbearing might be used as occasion demands. The shaft is supposed to beprovided with driving mechanism (not shown). Slidably mounted on theshaft 1 is a collar 2 provided with a groove 4 arranged to receive anarm 5 secured to a lever 6 which is pivoted at 7. At 8 is a similarcollar having a similar groove 9, adapted to receive the end of an arm10 secured to a lever 11 which is also pivoted at 7.

The collar 2 is provided with an arm 3 to which the end of a rod 12 isconnected, the end being secured to the arm 3 by means of a pivot pin13. The collar 8 is provided with an arm 14 to which the end of a rod 15is pivotally connected. The rod 12 passes through the collar 8.

At 17 I have shown a groove in the shaft 1 in which the rods 12 and 15are disposed. The upper part of this groove is widened at 19 so as toreceive the two rods 2() and 21 which are pivoted to the rod 15 and beftween which is pivoted a clutch member 22. The shape Of this clutchmember is best shown in F ig.v 1. As will be seen from this figure, itis provided with an extension 22a. The lower end of the clutch member 22is pivotally connected to the rod 12.

Disposed upon the shaft 17 are the gears 23, 24 and 25 and 2G, the firstnamed gear meshing with the teeth 23aN on a large gear 27, the secondwith the teeth 24a, and the third with the teeth 25a. These gears 23, 24and 25 are held in place by collars such as those shown at 26a and 27a,which also serve Vas strengthening rings for the shaft 1. The

gears are slotted as shown at 23h, 24h, and 25b to receive the extension22a of the clutch member 22.

The gears 23, 24 and 25 are placed at different distances from the shaft27 b of the large gear 27 for the purpose of obtaining variable speeds.rlhe shaft 1 also bears a fourth gear 26 having a slot 28h. This gear ismeshed With an intermediate gear 29, the gear 29 being meshed on itsopposite side with a gear 38. The latter gear engages teeth 302l on theupper side of the gear 27.

From the foregoing description of the various parts of the device theoperation thereof may be readily understood. lith the device in theposition shown in the drawing the gear 23 is in operation, since theclutch member 22 has been thrown so as to engage in the slot 23h. Therotation of the shaft 1 will, therefore, cause the rotation of the gear23, or, if the power is applied through the gear 27, the shaft 1 will becaused to rotate through the medium of the gear 23. Then it is desiredto effect a change of speed or movement in the reverse direction thelever 6 is moved in the direction indicated by the arrow. It will benoted that there is a slight clearance between indicated by the arrow,the rods 12 and 15 and the clutch member 22, will be moved so that thelatter may lie within the gear 24 or 25. If now the lever 6 is moved inthe opposite direction to that indicated by the arrow, it will throw theclutch extension 22a into the groove 24h (or 25b as the case may be)thereby securing the gear to the shaft 1. This will result in anincrease of the speed since, as stated before, the gears 24 and 25 arenearer the center of the gear 27. In order to give a reverse movement,the clutch member 22 may be withdrawn into the shaft by moving the lever6 as described, when a movement of the lever 11 in the oppositedirection to that indicated by the arrow will move the rods 12 and 15,the clutch member 22 and both collars along the shaft in the oppositedirection. When the clutch member 22 is within the gear 28, theextension may be brought into the groove 28a. This will impart a reversemotion to the gear 27 through the medium of the gears 29 and 30.

I claim:

1. In a power transmission mechanism, a

power shaft provided with a longitudinal groove, a grooved collarslidably mounted on said shaft, a plurality of gears loosely mounted onsaid power shaft having slots therein, a rod secured to said collar, apair of rods pivotally secured to said rst named rod, a clutch memberpivotally secured between said pair of rods, an operating rod for saidclutch member disposed in the groove in said power shaft, a secondgrooved collar slidably disposed on said shaft and secured to saidclutch operating rod, and a pair of levers provided with armsv arrangedto enter the respective grooves in said collars.

2. In a power transmission mechanism, a power shaft provided with alongitudinal groove, a plurality of gears loosely mounted on said powershaft, a pair ofslidable collars mounted on said power shaft, a clutchmemberpivotally mounted in the groove in said power shaft and adapted toengage said gears, a rod connecting said clut-ch member with one of saidcollars for moving the clutch member longitudinally and a second rodconnected with said clutch member and to one of said collars forswinging said clutch member on its pivot. A

ANDREV F. STURM.

Witnesses: Y

O. U. CARROLL, J. M. PALMER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

